本文實例講述了java之swing下拉菜單實現方法。分享給大家供大家參考。具體如下：
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import java.awt.*;import javax.swing.*;import java.awt.event.*;public class test extends JAppletimplements ItemListener{ JLabel jtf; ImageIcon a1, a2, a3; public void init(){ Container contentPane = getContentPane(); contentPane.setLayout(new FlowLayout()); JComboBox jc = new JComboBox(); jc.addItem("6"); jc.addItem("7"); jc.addItem("8"); jc.addItemListener(this); contentPane.add(jc); jtf = new JLabel(new ImageIcon("D:/data/Images/6.gif")); contentPane.add(jtf); } public void itemStateChanged(ItemEvent ie){ String s = (String)ie.getItem(); jtf.setIcon(new ImageIcon("D:/data/Images/"+s+".gif")); }} |
希望本文所述對大家的java程序設計有所幫助。
